我试图在docker composer中运行以下命令，以使用django admin启动项目：

docker-compose run app sh -c "django-admin startproject app ."

这将产生以下错误：

    Traceback (most recent call last):
  File "/usr/local/bin/django-admin", line 10, in <module>
    sys.exit(execute_from_command_line())
  File "/usr/local/lib/python3.7/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python3.7/site-packages/django/core/management/__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python3.7/site-packages/django/core/management/base.py", line 323, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/usr/local/lib/python3.7/site-packages/django/core/management/base.py", line 364, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python3.7/site-packages/django/core/management/commands/startproject.py", line 20, in handle
    super().handle('project', project_name, target, **options)
  File "/usr/local/lib/python3.7/site-packages/django/core/management/templates.py", line 155, in handle
    with open(new_path, 'w', encoding='utf-8') as new_file:
PermissionError: [Errno 13] Permission denied: '/manage.py'

Dockerfile如下：

FROM python:3.7-alpine
MAINTAINER anubrij chandra

ENV PYTHONUNBUFFERED 1

COPY ./requirements.txt /requirements.txt

RUN pip install -r /requirements.txt

RUN mkdir /app
COPY ./app /app



RUN adduser -D dockuser
USER dockuser

我的docker组合。yml：

version: "3"

services:
  app:
    build:
      context: .
    ports:
      - "8000:8000"
    volumes:
      - ./app:/app
    command: >
      sh -c "python manage.py runserver 0.0.0.0:8000"

我在这个堆栈溢出线程中应用了建议的解决方案，但它不起作用。

我使用的是Ubuntu 18.04。